Question

Assertion : $1\, M$ solution of $KCl$ has greater osmotic pressure than $1 \,M$ solution of glucose at the same temperature.
Reason : In solution $KCl$ dissociates to produce more number of particles.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (A)

$0.1\,M$ solution of $KCl$ has greater osmotic pressure than $0.1\,M$ solution of glucose at same temperature.
$\pi= iCRT$
$KCl \rightarrow K ^{+}+ Cl ^{-}$
So, i for $KCl =2$
For glucose $=1$
As $KCl$ electrolyte, it dissosciate into ions $K ^{+}$and $Cl ^{-}$while glucose not, decompose as it is organic solute. So, $i =1$.